EP 1038379 A4 20030102 - SYSTEM, DEVICE AND METHOD FOR PCM UPSTREAM TRANSMISSION UTILIZING AN OPTIMIZED TRANSMIT CONSTELLATION
Title (en)
SYSTEM, DEVICE AND METHOD FOR PCM UPSTREAM TRANSMISSION UTILIZING AN OPTIMIZED TRANSMIT CONSTELLATION
Title (de)
SYSTEM, EINRICHTUNG UND VERFAHREN ZUR AUFWÄRTS PCM-ÜBERTRAGUNG UNTER VERWENDUNG EINER OPTIMIERTEN SENDKONSTELLATION
Title (fr)
SYSTEME, DISPOSITIF ET PROCEDE DE TRANSMISSION EN AMONT MIC UTILISANT UNE CONSTELLATION DE TRANSMISSION OPTIMISEE
Publication
Application
Priority
- US 9824369 W 19981113
- US 99925497 A 19971229
Abstract (en)
[origin: WO9934566A1] A transmitter in an analog pulse code modulation (PCM) modem (12) which transmits analog levels over an analog channel (18) to produce constellation points at a quantization device (26), wherein the constellation points correspond to groups of data bits to be transmitted to a digital PCM modem (28), the transmitter includes: a transmitter device which selects for each group of data bits to be transmitted a constellation point corresponding to the group of data bits and transmits over the analog channel a level that will produce at the input to the quantization device the selected constellation point; wherein the constellation points are chosen from a transmit constellation consisting of a plurality of non-uniformly spaced constellation points that have substantially equivalent, minimized error probability, constellation point to constellation point.
IPC 1-7
IPC 8 full level
H04B 14/04 (2006.01); H04L 25/03 (2006.01); H04L 25/49 (2006.01); H04L 27/04 (2006.01)
CPC (source: EP KR)
H04L 25/03343 (2013.01 - EP); H04L 25/4927 (2013.01 - EP); H04L 27/04 (2013.01 - KR)
Citation (search report)
- [X] US 5659579 A 19970819 - HERZBERG HANAN [US]
- See references of WO 9934566A1
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 9934566 A1 19990708; AU 1586899 A 19990719; BR 9814510 A 20040420; CA 2317547 A1 19990708; CN 100344137 C 20071017; CN 1283352 A 20010207; DE 69839814 D1 20080911; EP 1038379 A1 20000927; EP 1038379 A4 20030102; EP 1038379 B1 20080730; JP 2002500472 A 20020108; KR 100416888 B1 20040205; KR 20010033691 A 20010425
DOCDB simple family (application)
US 9824369 W 19981113; AU 1586899 A 19981113; BR 9814510 A 19981113; CA 2317547 A 19981113; CN 98812792 A 19981113; DE 69839814 T 19981113; EP 98960216 A 19981113; JP 2000527065 A 19981113; KR 20007007214 A 20000628